amd-iommu: fix iommu flag masks
The feature bits should be set via bitmasks, not via feature IDs. [ Impact: fix feature enabling in newer IOMMU versions ] Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> LKML-Reference: <20090504102028.GA30307@amd.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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